Noam Postavsky <npostavs@users.sourceforge.net> writes:

> Live System User <nyc4bos@aol.com> writes:
>
>>   It's built by Fedora (RedHat).  I have debugging info but I belive
>>   the emacs binary might be stripped, if that matters.
>
> Hmm, you will need gdb, emacs debug info and probably the emacs sources
> as well.
>
> This link explains how to get the debug info:
> https://fedoraproject.org/wiki/StackTraces#What_are_debuginfo_rpms.2C_and_how_do_I_get_them.3F
>
> I'm not sure how to get sources under Redhat based distros.
>
> Also get .gdbinit from
> http://git.savannah.gnu.org/cgit/emacs.git/tree/src/.gdbinit?h=heads/emacs-25.3
>
>>   I dont know how to reproduce this with or without 'emacs -Q' but
>>   it has happened to me periodically so I decided to finally
>>   report it
>>
>>   I'll leave the sessuon around as long as I can.
>
> After you have installed the debugging symbols and gdb, attach gdb to
> the running Emacs by running
>
>     gdb -p xxxx
>
> Where xxxx is Emacs' pid (a number).  Find that out by running 'pgrep -a
> emacs'.  Then at the (gdb) prompt, type
>
>     source .gdbinit
>     break text_read_only
>     continue
>
> Then try to kill the buffer.  Hopefully the breakpoint will be hit and
> emacs becomes frozen.  At the (gdb) prompt, type
>
>     bt

      Additional info...

      Thanks.